Electrical connecter



0t 2, 1934- H. A. DOUGLAS ELECTRICAL CONNECTER Filed May 9. 1932 reenteroa 2, 1934 l UNITED srATEs PATENT ori-'ICE ELECTRICAL CONNECTER 1 yHarry Ayriouglas, Bronson, Mich. I Application my s, 1932, serial No.610,609 2 Claims. (C1. 11s-32s) '11o By the practice of my invention,the conductor by which the electrical connection between the currentconducting wires is made, is completely enclosed within a seamlessinsulating body, while at the' same time passages are provided therelthrough for the reception of the line terminals.

"The invention will be understood by reference.

to the illustrative embodiment and exemplary steps shown in theaccompanying drawing, in

whichl 'Figure 1 is aside elevation of a connecter made in accordancewth my invention with the cores still'in'place; Y. I

Figure 2 is a longitudinal section of the structure of Figure 1 onanenlarged scale, with one ofA the cores removed, and is also a sectionalview taken on the line 2-2 of Figure 3;

Figure -3 is a section taken on the'line 3-3 of Figure2 with both coresremoved;

Figure 4 is an elevational view similar to Figure 1, but with both coresremoved and showing, by dotted lines, how they terminals are received inthe connecter; and

Figure 5 shows a preferred preliminary step in the practice of myinvention.

In accordance with my invention, I provide a conductor 1 which isadvantageously made of brass and may have a central oblong portion 2 andturret-shaped end portions 3. Parallel apertures 3a., in this instancecylindrical, in the oblong portion 2 permitthe passage therethrough ofthe conventional bulbous terminals 4 of insulated current conductingwires 5 which are yeldingly retained in the conductor 1 by means nextdescribed and are put into electrical connection by said conductor. j

For yieldingly -retaining the terminals 4 in the conductor 1, I mayprovide a dome shaped detent 6 which is yieldingly projected into eachof the apertures 3a by a coil spring '1 housed in the turret-shapedportions 3 of the conductor 1 and pressing upon the detent through theintermediation of an annular nange stormed on the detent, which limitsthe movement o! the detent into the apertures`4. The detent 6 thus snapsinto the annular groove 9 in the bulbous terminals.

To aiord a seamless insulating covering for the conductor 1, as apreferred first step in the practice of my-'invention (see Figure 1), Iprovide two cylindrical steel cores 10 having a central portion 11shaped somewhat similarly to the terminals 60 4. The cores 10 terminateat one end in a portion 12 of reduced diameter and at the other end in aportion 13 of slightly larger diameter thanthe central portion 11. Thecentral portion 11 has therein an annular groove 14 which is adapted to65.

receive the detent 6 and locate the cores 10 in the conductor 1 inposition corresponding to the positions of the terminals 4. 'Y

Itwill be noted, as shown in Figures 1 and 5, that the cores 10 areplaced in the conductor 1 '(0 in reversed relationship and the enlargedportions 13 of the cores limit their insertion in the conductor to anextent that the groove 14 just registers with the detent 6. When thecores have been inserted in thev apertures 3a of the conductor 75 1 asjust described and as shown in Figure 5, an insulating body 15 composedof a phenolic condensation product, for example, is molded about theconductor and the cores by suitable molding means (not shown) to producethe intermediate structure shown in Figure 1` in which the conyductor iscompletely covered by a seamless insulating body, while at the same timeapertures through this body are effected by the cores 10, the insulatingbody 15 being molded to terminate short of the ends 12 and 13 of thecores and the cores thus protruding through upon each side of theconductor 1.

'I'he provision of the reduced end 12 of the cores a causes a shoulder16 to be produced at one end of each of the apertures 3a which limitsthe insertion of the terminals 4 therein to an extent where the grooves9 in the terminals just registerwith the detents 6.

The reduced portions 12 which protrude through the openings 12a alsofacilitate the removal of the cores from the intermediate structureshown in Figure 1. As shown in Figure 2, one of these cores has beenremoved, and in Figures 3 and 4 both cores have been removed, thusproviding passages 17 and 18 through the insulating body 15 upon eachside of the pertures 3a in the conductor 1 and registering erewith forthe reception of the terminals 4. Ob-

viously, the passages 17 have been produced by 105- the enlargedportions 13 of the cores and the passages 18 by the intermediateportions l1 of the cores, Vthe latter portions being desirably ofexactly the diameter of the largest diametered portion 19 of the bulboustips of the terminals 4.

The passages 17 .are desirably slightly larger to permit ready insertionof the terminals therethrough. A

'I'he springs 'I may he irst inserted in the hollow turrets 3 oftheconductor 1 through openings 20 in the outer ends of the turrets, andthe margins of these apertures then bent inwardly to retain the springstherein. The openings 20` are then desirably closed by a plug 21 ofsolder or the like, to prevent the material of the insulating body 1while still soft, from flowing into the turrets 3.

The invention is not limited to the specinc details oi' construction orthe sequence of steps described, but such changes maygbe made as fall,within the scope of the following claims without departing from theinvention.

' I claim:

1. An electrical connecter including an elon-- gated metallic conductorblock having adiacentv apertures extending .transversely therethroughtor the reception of terminal plugs and provided with a housing at eachend with a spring pressed detent mounted in the housing entering thecon' tiguows terminal receiving passage to engage and removablyretainthe terminal therein, said conductor block and spring housingentirely imbedded in a molded body ci.' insulating material providedwith oppositely disposed openings regisv tering with the respectiveterminal apertures in the conductor block and provided with oppositelydisposed extensions opposite each opening having a bore therein forminga continuation of the contiguous terminal receiving aperture.

2. The structure o! claim 1 wherein the outer end of each bore isprovided with a perforated end closure'limitng the passage oi' aterminal yplug therethrough.

HARRY A. DOUGLAS.

